212216334 has 24 divisors (see below), whose sum is σ = 466526760. Its totient is φ = 64307760.

The previous prime is 212216299. The next prime is 212216353. The reversal of 212216334 is 433612212.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145429 + ... + 146880.

It is an arithmetic number, because the mean of its divisors is an integer number (19438615).

Almost surely, 2^212216334 is an apocalyptic number.

212216334 is an abundant number, since it is smaller than the sum of its proper divisors (254310426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212216334 is a wasteful number, since it uses less digits than its factorization.

212216334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292336 (or 292325 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 212216334 is about 14567.6468243845. The cubic root of 212216334 is about 596.4759478393.

Adding to 212216334 its reverse (433612212), we get a palindrome (645828546).

The spelling of 212216334 in words is "two hundred twelve million, two hundred sixteen thousand, three hundred thirty-four".